Gas burner



Feb. 2, 1932. R 1 HAGMAN .1,843,361

GAS BURNER Filed Feb. l0, 1930 fag/@alor Po/p /jayeman 2|;V be adjusted to Patented'Feb. 2, 1932 PATENT OFFICE .EAIPLH TJ HAGEMAN, 0F CEDAR RAPIDS, IOWA.-

GAS BURNER Application inea February 1o, 1930. serial No.

The object gf my invention is toprovide a gas burner' of simple, durable and inexpensive construction, which is reliable in its operation and has a yminimum number of parts to be adjusted and replaced for repairs.

A further object is to provide a gas burner so constructed and arranged that no noise will be present during its operation, and further to eliminate backfiring at the time the iiame lo of the burner is being ignited or extinguished.

A further object is to provide an improved gas burner so constructed and arranged that av comparatively large ame port is provided and having means feeding a properly mixed mixture to said 'iiame port to produce a uniformly combustible mixture in said iame port, and

further to provide in connection with said burner means for feeding large volumes 0f secondary air to the. inner and outer surfaces of the flame.

A further object is to provide in a gas burner an adjustable'lame port whereby the burner may be easily and quickly adapted to feed various volumes of and whereby the burner may be adjusted to Voperate with various kinds of fuel and under different pressures.

A further object is to rovide a gas burner l 30 which may be success ully and etiiciently operated within combustion chambers, such as the interior of furnaces, under various draft' conditions and under conditions in which a limited air supply prevails.

My invention consists in the construction, arrangement and combination of the various parts of. the device, whereby the objects contemplated are attained, as hereinafter more fully set forth, pointed out in my-claims, and 40 illustrated in the accompanying drawings, in

which:

Figure 1 is a side elevation of my' improved burner.

45 of the same.

Figure 3 is a detail sectional view taken on the line 3-3 of Figure 2. Y

Figure 4 is a front detail sectional view 5o taken on the line 4-4 of Figure 1; and

for uniformly l -in the usual manner.'v The ity of the air fuel,

12 1s what I shall term a burner fl Figure '2 lis a vertical, central sectional view vNotches 26 are provided in Figure 5 is a side elevation of a modified form of my device.

My improved burner comprises a casing 10, having a chamber 11 and aV vertically arranged drical chamber 12, to form what I shall term a static pressure chamber.

Oneend of the mixing chamber 11 is provided with an air inlet opening 13, which is designed to be covered with the usual air adjusting plate- 14. Said plate is locked in its various adjusted position bymeans of a set screw 15 projecting through a slot 16. The

chamber 11 is also provided with a gas jet 17,

which is connected to a gas supply pipe 18 jet 17 provides means whereby the volume of gas delivered to the mixing chamber 11 may which in turn will increase or decrease the pressure within the chamber 11 and the velocenterin said chamber through 13. This in turn will increase the opening of the mixture within the the static pressure chamber 12.

Projecting verticallythrough the chamber lower end of the said iiue 19 is provided with a screwv threaded portion 20. The said flue 19 is also provided with a'series of passages 21 near` its lower end. j

Mounted longitudinally in the burner iiue 19 is what I shall term a secondaryair flue 22. The lower end of said flue 22 is screw threaded to co-operate with the screw threaded portion of the flue 19. The flue 22 isl of smaller diameter than the flue 19 so that a feed passage 23 is provided between the tubular members 19 and 22.

The upper end of the secondary'air iue 22 terminates in a laterally and outwardly projecting iiange 24 designed to be supported normally a slight distance above the upper end of the flue 19 to form an annular flame port 25. The size of this flame port 25 may beeasily and quickly adjusted by simply adjusting the flue 22 longitudinally of the flue 19 by means of the screwthreaded portions.

the lower end' of the flue 22 for receiving a suitable wrench by horizontally arranged mixingcylin'- y be varied,

means of which said adjustment may be easily and quickly performed. t

The operation of my improved burner 1s as follows:

Gas is fed to the burner through the pipe 18 in which is included the usual controlling valve 27. The gas enters the mixing chamber l1 through the nozzle 17 which has been adjusted to provide the desired pressure within the mixing chamber 11 and the static pressure chamber 12, the plate 14 being adj usted to form a propel' combustible mixture. The mixed gases are then forced into the chamber 12 around the vertical burner flue 19, and enter the said passage 2'3 through the passages 21, so that the mixture is moved upwardly through the said passage and delivered to the flame port 25, where it is ignited in the usual manner. An annular and somewhat conical shaped flame jet will then be produced. The outer surface of the ame'is fed by air rising upwardly'around the outer surface of the chamber 12, while the inner surface of the iiame jet is -fed by air rising through the secondary air flue 22.

The mixture as it travels upwardly through the said passage 23 will be heated to considerable extent and thereby greatly assisted in the combustion of the fuel as it is projected from the flame port 25. The said passage is comparatively narrow and long so that the danger of a flame moving downwardly through said passage through the openings 21 into the mixing chamber 11 is eliminated, due

, to the fact that the flame would have to pass between the comparatively cool tubular members 19 and 22, which would absorb the heat ofthe flame to such an extent that it would be extinguished before it entered the passages 21.,

By providing the annular flame port 25 and the iange 24 with adjustable means to in crease or decrease the size of said port, I have lprovided means whereby the area of the in'- letopening 13 and area of said flame port 25 can be so adjusted that the area of said flame port 25 is substantially equal to the area of the inlet opening 13 and thereby providing means whereby the velocity of the mixture is comparatively low at the point where combustion takes place, and thus eliminating the noise which usually accompanies a gas burner designed to feed the fuel mixtures to the point of combustion at a high velocity. v

lThe fact that l am able to feed mixtures at a low velocity at the point of combustion of the llame portcomes from the fact that l have provided a secondary air flue havinp' a comparatively large area so that a large amount of air may be fed to the interior of the flame jet.

My improved burner is particularly adapted to be used in the interior of combustion chambers such as are provided in heating furnaces in which the velocity of the drafts around the burner arevaried due to the chimney conditions of the furnace. Under these conditions it sometimes happens that the amount of air available to cause combustion of the mixture as it is fed to the burner is inadequate, in which case an auxiliary tube or pipe may be connected to the lower end of the tube 22. rl`he free end of the tube 28 is connected to a point outside of the combus tion chamber of the furnace whereby a large amount of air may be fed to the interior of the flame jet independently of the conditions within the combustion chamber of the furnace By mounting the passages 21 in the lower end of the flue 19 and entirely around said flue, I have provided means whereby the mixture will be fed very uniformly to the said passage 23, and in turn to the flame passage 25, the passage 23 being formed comparatively long and withva large amount of radiating surface to eliminate back tiring as above described.

'A very important feature of my device lies in the fact that three important; adjustments are provided. The member 17 is adjustable relative to the member 18 to increase or decrease the gas iow into the chamber 11, whereby a predetermined pressure may be maintained inthe chambers 11 and 12 regardless of the pressure within the gas mains. The member 14 provides means for maintaining the proper mixture of air and gas` within said chambers, while the adjustment of the two provides means for increasing or decreasing the size of the flame port so that the proper gas velocity at said port may be maintained wit-hout noise. rl`he opening through the tube 22 provides means whereby large volumes of secondary air may be fed to the inner surface of the dame, providing means whereby complete combustion may take place.

In Figure 5 l have illustrated a manifold 28 which is adapted to'support a number of flues 19, each of which is provided with an accompanying air tube 22. All of the burners thus formed receive a mixture from the common manifold 28. The said manifold 28 performs the function of the static chamber 12 and is provided with a mixing chamber or Venturi tube 29. 'lhe said tube 29 includes a supply pipe 18 and an adjustable valve 17 similar to that of my preferred form.

Thus it will be seen that l have provided a gas burner which is comparatively inexpensive of construction, which has few'moving parts to get out of order, which may be easily and quickly adjusted to deliver any desired -volume within the range of the burner, and which is adapted to operate under various draft conditions.

claim as my invention:

1. A gas burner comprising a mixing chamber having a static pressure chalnber, a burner liuc projecting vertif v through said static pressure chamber, a ,.endury air .flue pro- -an outwardly proj ectin jecting longitudinally through the burner Hue and of smaller diameter to form a feed passage between said Hues, the lower end of said burner Hue having mixture passages, the upper en'd of said secondary-air Hue having Hange to form a Hame port between said ange and the upper end of said burner Hue, and means for adjusting said Han e toward and from the end of said burner ue to increase and diminish the size of said Hame port. j

2. A gas burner com rising a mixing chamber, a vertical burner ue projecting through said chamber, having openings near its lower end, an air Hue mounted longitudinally through said burner Hue, said air Hue being of smaller diameter than the burner Hue and having its upper end provided with a laterally projecting Hange to form an annular Hue port between the upper end of said burner Hue and said Hange, means for adjusting the Hange toward or from the upper end of said burner Hue, means for feeding fuel and air to said mixing chamber under pressure, and means for adjusting the mixture of said fuel. 3. A gas burner comprising a casing having a substantially horizontal mixing chamber, a vertical static pressure chamber connected'to one end of said mixing chamber, said static of smaller diameter, the upper end of said air Hue having a laterally projecting Hange, and means for adjusting said air Hue longitudinally of'said burner Hue to increase and decrease the distance between said Hange and the upper end of said burner Hue;

6. A gas burner comprising a combined mixing and pressure chamber, a burner Hue projecting downwardly from the top of said chamber, said burner Hue having openings near its lower end, an air Hue projecting longi tudinally through said burner Hue and being of smaller diameter, the upper end of said air Hue having a laterally projecting Hange, means for adjusting said air Hue longitudinally of said burner Hue to increase and decrease the distance between said Hange and the upper end 0f said burner Hue, adjustable means for delivering air to said mixing chamber, and adjustable means for delivering gas to said mixing chamber.

Des Moines, Iowa, January 22, 1930.

. RALPH J. HAGEMAN.

chamber being provided with a vertically arranged burner Hue through its central portion, the lower end of said burner Hue being screw threaded and provided with a series of passages, an air Hue of smaller diameter than the burner Hue mounted longitudinally in said burner Hue, having its upper end provided with a laterally projecting Hange and its lower end screw threaded to co-act with the screw threaded portion of said burner Hue,

, and means for supplying a mixture of gas and air to the free end of said mixing chamber.

4'. A gas burner comprising a casing having a substantially horizontal mixing chamber, a vertical static pressure chamber connected to one end of said mixing chamber, said static chamber being provided with a vertically arranged burnerHue through its central portion, the lower end of said burner Hue being screw threaded and provided with aseries of l passages, an air Hue 'of smaller diameter than the burner Hue mounted longitudinally in 'said burner Hue, having its upper end provided with a laterally projecting Hange and its lower end screw threaded to co-act with the screw threaded portion of said burner Hue, means for supplying a mixture of gas and air to the free end of said mixing chamber, and an extension pipe for the lower end of said airHue.

. l 5. A gas burner' comprising a combined mixing and pressure chamber, a burner Huel projecting downwardly from the top of said chamber, vsald burner vHue having openings tudinally through said burner Hue and being near its lower end, an air Hue projecting longi- 

